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Diagnostic trouble code

P1101

25 owner reports and 463 manufacturer filings across 78 model years from Buick, Cadillac, Chevrolet, GMC.

PowertrainManufacturer-specific463 manufacturer filings25 owner reports

Where P1101 shows up

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2019 Chevrolet MalibuEngine And Engine Cooling223
2019 Chevrolet EquinoxEngine And Engine Cooling23
2019 GMC TerrainEngine And Engine Cooling23
2020 Chevrolet EquinoxEngine And Engine Cooling161
2020 Chevrolet MalibuEngine And Engine Cooling143
2018 Chevrolet MalibuEngine And Engine Cooling134
2018 Chevrolet EquinoxEngine And Engine Cooling16
2016 Chevrolet MalibuEngine And Engine Cooling133
2020 GMC TerrainEngine And Engine Cooling16
2018 GMC TerrainEngine And Engine Cooling151
2017 Chevrolet MalibuEngine And Engine Cooling123
2016 Buick EncoreEquipment12
2018 Buick EncoreEngine And Engine Cooling11
2017 Buick EncoreEquipment11
2017 Chevrolet CruzeEquipment82
2021 Chevrolet MalibuEngine And Engine Cooling73
2019 Buick EncoreEngine And Engine Cooling9
2016 Chevrolet CruzeEquipment81
2019 Chevrolet TraxEngine And Engine Cooling8
2019 Chevrolet CruzeEquipment7
2018 Chevrolet CruzeEngine And Engine Cooling7
2021 Chevrolet EquinoxEngine And Engine Cooling7
2019 Chevrolet VoltEquipment7
2018 Chevrolet VoltEquipment7
2017 Chevrolet VoltEngine And Engine Cooling7
2016 Chevrolet VoltEquipment7
2022 GMC TerrainEngine And Engine Cooling7
2021 GMC TerrainEngine And Engine Cooling7
2016 Buick RegalEngine And Engine Cooling6
2016 Cadillac ATSEngine And Engine Cooling6
2016 Cadillac CT6Engine And Engine Cooling6
2016 Cadillac CTSEngine And Engine Cooling6
2022 Chevrolet MalibuPower Train51
2018 Buick EnvisionEngine And Engine Cooling5
2017 Buick EnvisionEngine And Engine Cooling5
2018 Buick RegalEngine And Engine Cooling5
2017 Buick RegalEngine And Engine Cooling5
2016 Buick VeranoEngine And Engine Cooling5
2018 Cadillac ATSEngine And Engine Cooling5
2017 Cadillac ATSEngine And Engine Cooling5
2018 Cadillac CT6Engine And Engine Cooling5
2017 Cadillac CT6Engine And Engine Cooling5
2018 Cadillac CTSEngine And Engine Cooling5
2017 Cadillac CTSEngine And Engine Cooling5
2018 Chevrolet CamaroEngine And Engine Cooling5
2017 Chevrolet CamaroEngine And Engine Cooling5
2016 Chevrolet CamaroEngine And Engine Cooling5
2022 Chevrolet EquinoxStructure5
2016 Chevrolet TraxEquipment Adaptive/Mobility5
2017 Chevrolet TraxEquipment4
2018 Chevrolet TraxEngine And Engine Cooling3
2026 Buick EncoreUnknown Or Other1
2024 Buick EncoreEngine1
2019 Buick EnvisionEngine And Engine Cooling1
2024 Buick EnvistaEngine1
2019 Buick RegalEngine And Engine Cooling1
2019 Cadillac ATSEngine And Engine Cooling1
2026 Cadillac CT4Unknown Or Other1
2025 Cadillac CT4Unknown Or Other1
2024 Cadillac CT4Unknown Or Other1

Showing the 60 model years where P1101 appears most; it is on file for 78 in total.

A model year appears here because the code is named in its record, not because every one of these vehicles sets it. Counts are mentions in the federal files, not failure rates — nobody publishes the denominator.

What it gets filed under

Engine And Engine Cooling 201Equipment 86Power Train 70Structure 16Unknown Or Other 14Engine 13
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What owners said

Source: NHTSA complaint database

Owners’ own words, one per nameplate, scrubbed of anything identifying. These are unverified reports filed with NHTSA — they are what was said, not a finding that it was true.

Multiple diagnostic codes appear repeatedly, including P0299 (turbo underboost), P0101 (mass air flow performance), P1101 (intake airflow performance), and P0506 (idle control RPM too low)
2019 Chevrolet MalibuNov 25, 2025NHTSA owner report
Mechanics advised me that there is nothing wrong with my vehicle and drives smooth that the code P1101 maybe a recall because they have been seeing it much frequent on Chevy Cruze 2017,2018
2017 Chevrolet CruzeDec 4, 2024NHTSA owner report
When my racy begins to run out, my engine light has been coming on and I’ve been getting the same code P1101 I took my vehicle to GMC and they told me that the engine light came on because the tape came loose
2018 GMC TerrainDec 4, 2023NHTSA owner report

Manufacturer filings that name it

Source: NHTSA manufacturer communications

Service bulletins and campaigns whose filed summary names P1101. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.

What P1101 means

Source: SAE J2012 / OBD-II

P1101 is a manufacturer-specific code: the second character is a 1, which under the OBD-II standard hands the definition to whoever built the vehicle. The same code can mean one thing on a Ford and something unrelated on a Hyundai. Any site that prints a single definition for it is guessing.

A stored code names the test that failed, never the part that caused it. It is the starting point of a diagnosis, not its conclusion — the same code has several possible causes and the cheap one is not always right.

Common questions about P1101

Source: NHTSA files and the OBD-II standard

Why does this page not define P1101?

Because it cannot be defined honestly. The second character of a trouble code says who owns its meaning, and a 1 or a 3 hands that to the manufacturer. Sites that print one definition for a manufacturer-specific code are showing you one automaker's meaning and hoping it is yours.

Can I keep driving with P1101 stored?

Nobody can answer that from the code alone, and a site that does is guessing. A steady light generally means the fault was logged and the vehicle is in a reduced-risk mode; a flashing light means stop soon, because a misfiring engine can destroy a catalytic converter in minutes. The safe read of this page is the mileage and the components, not permission.

Does a code mean the car is recalled?

No. Recalls are filed by campaign and matched by VIN, and none of them are triggered by a scan tool. If you want to know whether an open recall applies to one specific vehicle, check the VIN at nhtsa.gov/recalls — that is the only source that settles it.

Why do the counts here differ from other sites?

Because these are not estimates. Every number on this page is a count of documents in NHTSA's own files: manufacturer communications that name the code in their filed summary, and owner complaints that name it in the narrative. We do not model, weight or extrapolate them.

Will clearing the code fix it?

Clearing turns the light off and erases the freeze-frame data a technician would have used to work out what happened. If the condition is still there the code returns, usually within a few drive cycles, and the diagnosis now starts from less information than before.